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RRB JE · Topic-wise previous year questions

General Science Previous Year Questions (page 4)

286 General Science questions asked in RRB JE previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.

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Physics: Electricity & Magnetism 59Physics: Light & Sound 32Chemistry: Acids, Bases & Salts 28Chemistry: Reactions 28Physics: Motion & Force 21Biology: Cell & Genetics 19Physics: Heat 18Biology: Plants 17Chemistry: Atoms & Periodic Table 12Biology: Nutrition & Diseases 11Chemistry: Carbon & Compounds 8
Q151RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What is the relationship between current (I), power (P), and voltage (V)?
  1. AI = P2V
  2. BI = PV
  3. CI = V ÷ P
  4. DI = P ÷ V
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Correct answer: (D) I = P ÷ V

Q152RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What is the process by which sodium hydroxide is prepared?
  1. ASolvay’s process
  2. BChlor-alkali process
  3. CHaber’s process
  4. DContact process
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Correct answer: (B) Chlor-alkali process

Q153RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What determines the sex of a child in humans?
  1. AEnvironmental cues
  2. BThe temperature at which fertilised eggs are placed
  3. CThe fate of the embryo
  4. DGenetic constitution
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Correct answer: (D) Genetic constitution

Q154RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
Which of the following is a natural ecosystem?
  1. ACrop field
  2. BAquarium
  3. CGarden
  4. DForest
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Correct answer: (D) Forest

Q155RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
In a certain code language, ‘house fire gas’ is coded as ‘dy ph mt’, ‘pressure gas station’ is coded as ‘lp ph st’, ‘station house farm’ is coded as ‘st bq dy’. What is the code for 'gas' in that language? (Note: All the codes are two-letter coded only.)
  1. Ast
  2. Blp
  3. Cmt
  4. Dph
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Correct answer: (D) ph

Q156RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
The dark blue colour in the pH scale refers to __________.
  1. Astrong acidic solution
  2. Bweak basic solution
  3. Cneutral solution
  4. Dstrong basic solution
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Correct answer: (B) weak basic solution

Q157RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
Which of the following is the product of the neutralisation of hydrochloric acid (HCl) with sodium hydroxide (NaOH)?
  1. ASodium hydroxide and hydrochloric acid
  2. BSodium chloride and water
  3. CSodium chloride and hydrogen gas
  4. DSodium hydroxide and water
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Correct answer: (B) Sodium chloride and water

Q158RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
Washing soda (Na₂CO₃·10H₂O) is obtained from which compound in the Solvay process?
  1. ASodium chloride
  2. BSodium hydroxide
  3. CSodium bicarbonate
  4. DSodium sulphate
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Correct answer: (C) Sodium bicarbonate

Q159RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What is the primary purpose of an electric fuse in a household circuit?
  1. ATo reduce resistance in the circuit
  2. BTo increase current flow
  3. CTo regulate voltage supply
  4. DTo prevent overloading and short circuits
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Correct answer: (D) To prevent overloading and short circuits

Q160RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What are regenerative cells used by Hydra for?
  1. AHydra uses regenerative cells for reproduction by sexual reproduction.
  2. BHydra uses regenerative cells for reproduction by spore formation.
  3. CHydra uses regenerative cells for reproduction by fragmentation.
  4. DHydra uses regenerative cells for reproduction by budding.
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Correct answer: (D) Hydra uses regenerative cells for reproduction by budding.

Q161RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What is the power rating of a device that draws 1.75 A of current when connected to a 180-V source?
  1. A105 W
  2. B315 W
  3. C225 W
  4. D440 W
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Correct answer: (B) 315 W

Q162RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
Which of the following rules is used to determine the direction of the force on a current-carrying conductor in an electric motor?
  1. AFleming’s Right-Hand Rule
  2. BAmpere's Law
  3. CRight-Hand Thumb Rule
  4. DFleming’s Left-Hand Rule
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Correct answer: (D) Fleming’s Left-Hand Rule

Q163RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
The power in a circuit having voltage V and current I during time interval t is:
  1. AV/I
  2. BI × V
  3. C(I × t)/V
  4. DI/V
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Correct answer: (B) I × V

Q164RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
In a parallel circuit, how does the voltage across each resistor compare to the total voltage supplied by the battery?
  1. AIt is the same for each resistor.
  2. BIt is inversely proportional to the resistance.
  3. CIt is zero.
  4. DIt is divided according to the resistance values.
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Correct answer: (A) It is the same for each resistor.

Q165RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
An emf is induced whenever there is a change in the magnetic field linked with electric circuits. This is stated by the:
  1. AOhm's law
  2. BGravitation law
  3. CNewton's law
  4. DFaraday's law
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Correct answer: (D) Faraday's law

Q166RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
Which of the following reactions does NOT represent a neutralisation reaction?
  1. AH₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O
  2. BCH₃COOH + NaOH → CH₃COONa + H₂O
  3. CHCl + NaOH → NaCl + H₂O
  4. DNa₂CO₃ + HCl → NaCl + CO₂ + H₂O
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Correct answer: (D) Na₂CO₃ + HCl → NaCl + CO₂ + H₂O

Q167RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
If a child inherits an Y chromosome from the father, what will be the sex of the child?
  1. AFemale
  2. BMale
  3. CHermaphrodite
  4. DCannot be determined
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Correct answer: (B) Male

Q168RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Why are sulphide ores usually converted into oxides before the extraction of metals?
  1. AMetal sulphides react faster with carbon
  2. BSulphide ores are unstable at room temperature
  3. CSulphide ores contain more gangue materials
  4. DMetal oxides are easier to reduce than sulphides
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Correct answer: (D) Metal oxides are easier to reduce than sulphides

Q169RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
What is the primary composition of the stable composite developed by IIT Mandi that prevents 2D semiconductors from degrading?
  1. ACarbon nanotubes embedded in polymer matrix
  2. BBoron nitride mixed with epoxy resin
  3. CTungsten disulfide (WS) encapsulated in polydimethylsiloxane (PDMS)
  4. DGraphene combined with silicone
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Correct answer: (C) Tungsten disulfide (WS) encapsulated in polydimethylsiloxane (PDMS)

Q170RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Why are brackets used in the formula Ca(OH)₂?
  1. ATo show ionic nature
  2. BTo balance oxygen atoms
  3. CTo indicate two hydroxide groups
  4. DTo represent molecular bonding
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Correct answer: (C) To indicate two hydroxide groups

Q171RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
A dentist uses a mirror to obtain a large image of a patient’s tooth. Which mirror should the dentist use and why?
  1. APlane mirror, because it gives a real image
  2. BConcave mirror, because it gives a magnified image
  3. CSpherical mirror, because it gives a virtual image
  4. DConvex mirror, because it gives a magnified image
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Correct answer: (B) Concave mirror, because it gives a magnified image

Q172RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
What is the primary material used to develop vermicompost?
  1. ABacteria and viruses
  2. BEarthworms
  3. CYeast
  4. DChemical fertilisers
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Correct answer: (B) Earthworms

Q173RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
In a micelle, which part faces outward toward water?
  1. AHydrocarbon tail
  2. BIonic head
  3. CNon-polar end
  4. DGrease molecule
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Correct answer: (B) Ionic head

Q174RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
A farmer wants to grow wheat with better baking quality and resistance to drought. Which two characteristics should be targeted in variety improvement?
  1. AHigher yield and wider adaptability
  2. BImproved quality and abiotic resistance
  3. CImproved quality and biotic resistance
  4. DWider adaptability and biotic resistance
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Correct answer: (B) Improved quality and abiotic resistance

Q175RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Why does our palm feel cold when acetone or petrol is poured on it?
  1. AThe liquid blocks heat flow from surroundings
  2. BThe liquid increases moisture on skin surface
  3. CThe liquid absorbs heat from the skin to evaporate
  4. DThe liquid reacts chemically with our skin surface
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Correct answer: (C) The liquid absorbs heat from the skin to evaporate

Q176RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Which of the following situations is NOT an example of action and reaction forces?
  1. AA swimmer pushing water backwards
  2. BA bat hitting a cricket ball
  3. CA ball thrown upward comes back down due to the pull of gravity.
  4. DA rocket launching upwards
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Correct answer: (C) A ball thrown upward comes back down due to the pull of gravity.

Q177RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Which waste based difference between the renal artery and renal vein is directly related to excretory function?
  1. AThe renal vein has higher pressure
  2. BThe renal artery has more valves
  3. CThe renal artery contains more urea
  4. DThe renal vein contains more oxygen
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Correct answer: (C) The renal artery contains more urea

Q178RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Which of the following is usually 'stored under high pressure'?
  1. AN2
  2. BH2
  3. CSolid CO2
  4. DNaCl
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Correct answer: (D) NaCl

Q179RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
The Five Ps of Sustainable Development are:
  1. APoverty, Peace, Protection, Plant, Product
  2. BPopulation, Peace, Production, Power, Partnership
  3. CPeople, Peace, Power, Planet, Partnership
  4. DPeople, Peace, Prosperity, Planet, Partnership
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Correct answer: (D) People, Peace, Prosperity, Planet, Partnership

Q180RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
A farmer wants to plant 95 mango trees, 171 banyan trees, and 152 banana trees in equal rows (in terms of the number of trees). Also, he wants to create distinct rows of trees, with only one type of tree in each row. Find the minimum number of rows required.
  1. A23
  2. B18
  3. C19
  4. D22
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Correct answer: (D) 22

Q181RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Which of the following tissues ensures that food made in the leaves is delivered to all plant parts?
  1. APhloem
  2. BMesophyll
  3. CXylem
  4. DEpidermis
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Correct answer: (A) Phloem

Q182RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Plant diseases are caused by pathogens transmitted through:
  1. ASunlight exposure
  2. BSoil, water and air
  3. CCrop residues alone
  4. DFertilisers and manure only
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Correct answer: (B) Soil, water and air

Q183RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
What conclusion can be drawn from the experiment in which potassium permanganate solution remains coloured even after repeated dilution?
  1. AParticles of matter are extremely small in size
  2. BParticles of matter are fixed and stationary
  3. CParticles of matter are visible to naked eye
  4. DParticles of matter occupy no space at all
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Correct answer: (A) Particles of matter are extremely small in size

Q184RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Ozone shields the surface of the Earth from which type of radiation coming from the Sun?
  1. AX rays
  2. BWhite light
  3. CInfra-red
  4. DUltra violet
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Correct answer: (D) Ultra violet

Q185RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Which of the following everyday mixtures is best classified as a suspension?
  1. ASalt solution prepared in water
  2. BSugar completely dissolved in water
  3. CCopper sulphate dissolved in water
  4. DChalk powder mixed with water
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Correct answer: (D) Chalk powder mixed with water

Q186RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
When dilute hydrochloric acid reacts with calcium carbonate, the gas evolved is passed through limewater. On passing the gas in excess, the milkiness disappears due to the formation of:
  1. ACalcium oxide
  2. BCalcium hydrogen carbonate
  3. CCalcium carbonate
  4. DCalcium hydroxide
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Correct answer: (B) Calcium hydrogen carbonate

Q187RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
Why are metals such as sodium and calcium extracted by electrolytic reduction instead of heating with carbon?
  1. AThey decompose when heated with carbon
  2. BThey have greater affinity for oxygen than carbon
  3. CThey exist only as molten chlorides in nature
  4. DThey form unstable oxides at high temperature
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Correct answer: (B) They have greater affinity for oxygen than carbon

Q188RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
What is the sign of the focal length for a convex lens as per the sign convention for spherical lenses?
  1. AZero
  2. BVariable
  3. CNegative
  4. DPositive
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Correct answer: (D) Positive

Q189RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
A student uses a convex lens to project an image of a tree onto a wall. If the image is found to be smaller than the tree, what can be inferred about the tree's position relative to the lens?
  1. AThe tree is at twice the focal length from the lens.
  2. BThe tree is placed beyond twice the focal length (beyond 2F) of the lens.
  3. CThe tree is between the lens and its focal point.
  4. DThe tree is at the focal point of the lens.
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Correct answer: (B) The tree is placed beyond twice the focal length (beyond 2F) of the lens.

Q190RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
A passenger in a moving car feels a jerk backward when the car suddenly starts. How does the first law of motion explain this experience?
  1. AThe passenger tends to remain at rest while the car moves forward, showing inertia.
  2. BFriction from the seat creates the backward jerk.
  3. CThe passenger is pushed backward by the air inside the car.
  4. DThe seat pushes the passenger forward, causing the sensation.
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Correct answer: (A) The passenger tends to remain at rest while the car moves forward, showing inertia.

Q191RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
Refer to the two statements given below and choose the CORRECT option. Statement A: While writing the chemical formula of a compound, the total positive and negative charges must balance each other. Statement B: Balancing valencies ensures that the compound formed is electrically neutral.
  1. AStatement A is incorrect but B is correct.
  2. BBoth statements A and B are correct.
  3. CBoth statements A and B are incorrect.
  4. DStatement A is correct but B is incorrect.
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Correct answer: (B) Both statements A and B are correct.

Q192RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
An electric refrigerator has a power rating of 500 W and is used for 6 hours each day. If the cost of electrical energy is ₹4.00 per kilowatt-hour, what will be the total cost of operating the refrigerator for 30 days?
  1. A₹360
  2. B₹240
  3. C₹180
  4. D₹300
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Correct answer: (A) ₹360

Q193RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
Why is alcohol considered a cleaner fuel than petrol?
  1. AIt produces less smoke
  2. BIt burns at low temperature
  3. CIt burns without oxygen
  4. DIt gives higher energy
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Correct answer: (A) It produces less smoke

Q194RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
If the bicuspid (mitral) valve fails to close properly, which immediate effect is most likely during ventricular contraction?
  1. ABackflow of blood from the left ventricle to the left atrium
  2. BBackflow of blood from the right ventricle to the right atrium
  3. CMixing of oxygenated and deoxygenated blood in the ventricles
  4. DReduced flow of blood to the lungs
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Correct answer: (A) Backflow of blood from the left ventricle to the left atrium

Q195RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
Which statement accurately describes how energy transforms during the free fall of an object under gravity?
  1. ABoth potential and kinetic energies remain constant.
  2. BPotential energy and kinetic energy both decrease.
  3. CPotential energy is converted into heat energy during the fall.
  4. DPotential energy decreases while kinetic energy increases, maintaining constant total mechanical energy.
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Correct answer: (D) Potential energy decreases while kinetic energy increases, maintaining constant total mechanical energy.

Q196RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
If atmospheric refraction did not occur, which change would be most noticeable during the observation of stars from Earth?
  1. AStars would change color rapidly.
  2. BStars would disappear from the night sky.
  3. CPlanets would twinkle like stars.
  4. DStars would not twinkle; their light would remain steady.
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Correct answer: (D) Stars would not twinkle; their light would remain steady.

Q197RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
What is the reason why electrons move in a conducting wire when connected to a battery, but not when the wire is left untouched?
  1. AA battery creates a potential difference that sets electrons in motion
  2. BGravity acts on electrons in the wire
  3. CWire is made of copper
  4. DElectrons have intrinsic energy for movement
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Correct answer: (A) A battery creates a potential difference that sets electrons in motion

Q198RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
A student adds lead (II) nitrate (Pb(NO3)2) to an unknown solution. A yellow precipitate forms. What could the unknown solution be?
  1. APotassium iodide (KI)
  2. BCopper sulphate (CuSO4)
  3. CSodium chloride (NaCl)
  4. DBarium sulphate (BaSO4)
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Correct answer: (A) Potassium iodide (KI)

Q199RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
Washing soda is commonly used to:
  1. ARemove grease and soften water
  2. BNeutralise acids in human blood
  3. CIncrease acidity in baked foods
  4. DPreserve meat for long periods
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Correct answer: (A) Remove grease and soften water

Q200RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
A gardener notices fallen leaves under a tree. Which strategy of plant excretion does this illustrate, and what type of waste handling is involved?
  1. AExcreting waste through roots only.
  2. BReleasing waste as oxygen only.
  3. CStoring waste in leaves that fall off.
  4. DConverting waste into fruits.
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Correct answer: (C) Storing waste in leaves that fall off.

How to use these RRB JE General Science questions

Every question here was asked in a real RRB JE paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full RRB JE papers as timed tests to check your speed under exam conditions.

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